. >>> that was just one of the dozens of politicians, celebrities, civil rights leaders and others who are arriving in south africa to pay their respects to nelson mandela but only a select few got to hitch a ride with the president, including one guy who sat in that big chair before. the ex-presidents club has been called the most exclusive one in the world and they have been depicted as a super group of super heroes by "snl" but what happens in reality when you're stuck on a 19 hour flight with someone who has spent years repudiating everything you stand for? well, actually, it can mean beautiful things. the world is quickly preparing for what may be the largest gathering of heads of state since winston churchill's funeral in 1965. representing the u.s. alone will be presidents barack obama, george w. bush, bill clinton and jimmy carter. comprising one of the most prestigious frequent flyer clubs in the world. today, air force one departed for south africa, where more than 90 world leaders are planning to attend nelson mandela's memorial tuesday in johannesburg. inside air force one,